Global Patent Index - EP 0098895 A1

EP 0098895 A1 19840125 - Rigid diaphragm transducer with plural coils.

Title (en)

Rigid diaphragm transducer with plural coils.

Title (de)

Wandler mit starrer Membran und mehreren Spulen.

Title (fr)

Transducteur à diaphragme rigide avec plusieurs bobines.

Publication

EP 0098895 A1 19840125 (EN)

Application

EP 82106425 A 19820716

Priority

US 18694280 A 19800915

Abstract (en)

A rigid surface transducer of the electro-acoustic type more commonly referred to as an audio speaker. The transducer comprises an improved diaphragm and driver configuration and improved excitation modes. The improved features are accomplished by the combination of: a driver (21) comprising at least two pairs of magnets (23), the magnets of each pair being spaced apart in one direction a first distance to form a first pair of gaps, (45) each pair of gaps being spaced apart in another direction to form a second gap (25); a diaphragm (5) and coil support assembly (1) including: a coil support (3) comprising a pair of elongated members (3) spaced apart a distance greater than the second gap (25); a spirally wound coil (7) on an outside face (17) of each of the elongated members (3), the end of the coils adapted to be coupled to an electrical signal generating means; a nonflexible nonplanar diaphragm member (5) mounted between inside faces of the elongated members (3); one of the elongated members being located in each of the pair of first gaps (45); and, the diaphragm being located in the second gap (25).

IPC 1-7

H04R 9/06; H04R 9/04; H04R 7/14

IPC 8 full level

H04R 7/04 (2006.01); H04R 7/14 (2006.01); H04R 9/04 (2006.01)

CPC (source: EP US)

H04R 7/045 (2013.01 - EP US); H04R 7/14 (2013.01 - EP US); H04R 9/04 (2013.01 - EP US)

Citation (search report)

Designated contracting state (EPC)

AT BE CH DE FR GB IT LI LU NL SE

DOCDB simple family (publication)

EP 0098895 A1 19840125; US 4354066 A 19821012

DOCDB simple family (application)

EP 82106425 A 19820716; US 18694280 A 19800915